FLUID-5432: In uploader, add the aria label to indicate the way to remove the selected file when the focus is on a file row.
FLUID-5432: In uploader, add the aria label for the file remove button itself.
Merge branch 'master' into FLUID-5432
FLUID-5432: Simplified the remove button aria label in uploader.
Merge remote-tracking branch 'cindy/FLUID-5432'

* cindy/FLUID-5432:
  FLUID-5432: Simplified the remove button aria label in uploader.
  FLUID-5432: In uploader, add the aria label for the file remove button itself.
  FLUID-5432: In uploader, add the aria label to indicate the way to remove the selected file when the focus is on a file row.